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Subject[PATCH RFC tip/core/rcu 01/30] net: convert to rcu_dereference_index_check()
Date
The task_cls_classid() function applies rcu_dereference() to integers,
which does not work with the shiny new sparse-based checking in
rcu_dereference(). This commit therefore moves to the new RCU API
rcu_dereference_index_check().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
include/net/cls_cgroup.h | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h
index 726cc35..dd1fdb8 100644
--- a/include/net/cls_cgroup.h
+++ b/include/net/cls_cgroup.h
@@ -45,7 +45,8 @@ static inline u32 task_cls_classid(struct task_struct *p)
return 0;

rcu_read_lock();
- id = rcu_dereference(net_cls_subsys_id);
+ id = rcu_dereference_index_check(net_cls_subsys_id,
+ rcu_read_lock_held());
if (id >= 0)
classid = container_of(task_subsys_state(p, id),
struct cgroup_cls_state, css)->classid;
--
1.7.0.6


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